/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.basedt.dms.plugins.datasource.impl.postgre;

import com.basedt.dms.plugins.datasource.dto.SchemaDTO;
import com.basedt.dms.plugins.datasource.dto.TypeInfoDTO;
import com.basedt.dms.plugins.datasource.impl.jdbc.JdbcCatalogHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import static com.basedt.dms.plugins.datasource.enums.DbObjectType.*;

public class PostgreCatalogHandler extends JdbcCatalogHandler {

    @Override
    public List<SchemaDTO> listSchemas(String catalog, String schemaPattern) throws SQLException {
        List<SchemaDTO> list = super.listSchemas(catalog, schemaPattern);
        return list.stream().filter(s -> {
            if ("pg_catalog".equalsIgnoreCase(s.getSchemaName()) ||
                    "information_schema".equalsIgnoreCase(s.getSchemaName())) {
                return false;
            } else {
                return true;
            }
        }).collect(Collectors.toList());
    }

    @Override
    public Map<String, TypeInfoDTO> listDataType() throws SQLException {
        Map<String, TypeInfoDTO> map = super.listDataType();
        map.entrySet().removeIf((entry) -> entry.getKey().startsWith("_"));
        return map;
    }

    @Override
    public List<String> listObjectTypes() throws SQLException {
        List<String> list = new ArrayList<String>() {{
            add(TABLE.name());
            add(VIEW.name());
            add(MATERIALIZED_VIEW.name());
            add(FOREIGN_TABLE.name());
            add(FUNCTION.name());
            add(SEQUENCE.name());
        }};
        return list.stream().map(String::toLowerCase).collect(Collectors.toList());
    }
}
